You can't have a "correct theory." A theory is not a fact or a final conclusion. In its finest form, it's a concept that becomes ever stronger as evidence continues to accumulate, or it's a concept that may cheerfully be blown out of the water by powerful evidence that undermines it. The misuse of the word by non-scientists who are trying to look clever infuriates many a scientist. That's my theory and I'm sticking to it. ;-)